221840036404 has 24 divisors (see below), whose sum is σ = 448072950528. Its totient is φ = 94132970400.

The previous prime is 221840036357. The next prime is 221840036461. The reversal of 221840036404 is 404630048122.

It is a self number, because there is not a number n which added to its sum of digits gives 221840036404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39219244 + ... + 39224899.

It is an arithmetic number, because the mean of its divisors is an integer number (18669706272).

Almost surely, 2^221840036404 is an apocalyptic number.

It is an amenable number.

221840036404 is an abundant number, since it is smaller than the sum of its proper divisors (226232914124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221840036404 is a wasteful number, since it uses less digits than its factorization.

221840036404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78444255 (or 78444253 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The spelling of 221840036404 in words is "two hundred twenty-one billion, eight hundred forty million, thirty-six thousand, four hundred four".